28487961 has 12 divisors (see below), whose sum is σ = 42938688. Its totient is φ = 18166104.

The previous prime is 28487951. The next prime is 28487981. The reversal of 28487961 is 16978482.

It is not a de Polignac number, because 28487961 - 2⁵ = 28487929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28487941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68605 + ... + 69018.

It is an arithmetic number, because the mean of its divisors is an integer number (3578224).

Almost surely, 2^28487961 is an apocalyptic number.

It is an amenable number.

28487961 is a deficient number, since it is larger than the sum of its proper divisors (14450727).

28487961 is a wasteful number, since it uses less digits than its factorization.

28487961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137652 (or 137649 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 28487961 is about 5337.4114512561. The cubic root of 28487961 is about 305.4127208456.

The spelling of 28487961 in words is "twenty-eight million, four hundred eighty-seven thousand, nine hundred sixty-one".